a= int(input("a类型"))
if 5>a :
    print('小于5')
elif a == 5 :
    print('等于5')
else :
    print('大于5')
print(a)

if a>10 or a <20:
    print('a小于10或大于20')

year = int(input("输入年份"))
if (year%4 == 0 and year %100 !=0) or (year % 400 == 0):
    print("%d是闰年" % year)
else:
    print("%d  不是闰年" %year)
